Custom plastic housing manufacturer

We are a specialized custom plastic housing manufacturer, engineering and producing complete protective enclosures, cases, and covers that form the essential shell for your products. We operate as a seamless extension of your team, providing an integrated service from concept and design through to precision molding, finishing, and final assembly. Unlike suppliers who only make individual parts, we deliver fully realized, ready-to-integrate housing sub-assemblies.

Custom Plastic Fitting Features: Structural Design & Material Matching

Our plastic fitting injection molding service is anchored in precision structural customization, as fitting performance depends on geometric accuracy and seal reliability. Our engineering team collaborates with you to design fittings tailored to your connection type, flow rate, and installation environment: For threaded fittings (NPT, BSP, metric), we optimize thread profiles (tapered, straight) and pitch accuracy (±0.01mm) to ensure tight sealing and easy assembly; For push-to-connect fittings (for quick installation), we refine the collet and O-ring groove design to guarantee secure tube retention and leak-proof performance; For compression fittings (for high-pressure applications), we design ferrule geometries to create uniform compression on tubes; For manifold fittings (for multi-port fluid distribution), we optimize internal flow channels to minimize pressure drop and ensure uniform flow distribution. Key custom structural features include: precision sealing surfaces (Ra ≤ 0.8μm), reinforced shoulders (for pressure resistance), anti-rotation ribs (for installation stability), and integrated filters/valves (for functional integration). Every fitting design undergoes pressure testing (up to 100MPa) and leak testing (using helium or water) to validate performance before mass production.

Material matching is pivotal for plastic fitting longevity, and our service includes custom material selection based on your application’s fluid type, pressure, temperature, and chemical exposure. For general plumbing/HVAC fittings (water, air): We use PP or PVC for cost-effectiveness, chemical resistance, and easy molding. For high-pressure industrial fluid handling fittings (oil, hydraulic fluids): We select glass-fiber reinforced nylon (PA66+GF 20–30%) or POM for excellent mechanical strength and pressure resistance. For high-temperature automotive fittings (e.g., coolant lines, fuel systems): We choose heat-stabilized PPS or PEI that withstands 120–180°C. For medical device fittings (e.g., IV lines, diagnostic equipment): We use FDA-approved PP, TPU, or PEEK for biocompatibility and sterile performance. For chemical processing fittings (acids, solvents): We opt for PVDF or PTFE-lined plastics for superior chemical resistance. We also test material compatibility with the target fluid to avoid degradation over time.

Key Plastic Materials for Fitting Injection Molding & Their Applications

Plastic fitting performance is directly tied to material properties, and our plastic fitting injection molding service offers a range of proven materials tailored to specific application demands:

- Polypropylene (PP): Ideal for general-purpose plastic fittings—plumbing pipes, HVAC air ducts, water treatment system components. Cost-effective, corrosion-resistant to water/weak acids, and suitable for low to medium pressure (up to 1.6MPa) and temperatures (-10°C to 95°C). Easy to weld and assemble, making it a top choice for residential and commercial plumbing.

- PVC (Polyvinyl Chloride): Used for rigid plastic fittings—industrial plumbing, irrigation systems, chemical transfer lines. Offers excellent chemical resistance (to most acids, bases, and salts), high rigidity, and pressure resistance (up to 2.5MPa). Operating temperature range: 0°C to 60°C. Suitable for both indoor and outdoor applications due to UV resistance (with additives).

- PA66+GF (Nylon 66 with Glass Fiber): For high-pressure industrial fittings—hydraulic lines, fuel system fittings, heavy-duty fluid handling components. Glass fiber reinforcement boosts tensile strength (up to 70MPa) and pressure resistance (up to 10MPa). Operating temperature range: -30°C to 120°C. Resistant to oils and greases, making it ideal for automotive and industrial machinery applications.

- PVDF (Polyvinylidene Fluoride): For chemical-resistant fittings—chemical processing lines, semiconductor manufacturing, laboratory equipment. Offers superior resistance to almost all chemicals (acids, solvents, oxidizers) and high temperature resistance (up to 150°C). Pressure resistance up to 4MPa. FDA-approved grades available for food and pharmaceutical applications.

- TPU (Thermoplastic Polyurethane): For flexible plastic fittings—medical IV lines, automotive vacuum hoses, beverage dispensing systems. Flexible (Shore A 60–90), kink-resistant, and offers excellent seal performance. Biocompatible grades available for medical use, with operating temperature range: -40°C to 120°C.

Plastic Fitting Injection Molding Process: Features & Advantages

Our plastic fitting injection molding process is engineered for precision and reliability, leveraging advanced technology to meet the strict requirements of fluid/gas system components. Key process features include: High-precision mold engineering—using hardened steel molds with CNC-machined cavities (tolerance ±0.005mm) to ensure consistent fitting dimensions, especially for sealing surfaces and threads; Controlled injection parameters—real-time monitoring of melt temperature (180–280°C, depending on material), injection pressure (70–130MPa), and cooling time to prevent warpage and ensure uniform material distribution; In-mold labeling/insert integration—ability to mold in metal inserts (for strength) or apply labels during molding, eliminating post-processing; In-line quality inspection—100% dimensional scanning, pressure testing, and leak testing (helium leak detection for high-precision medical fittings) to ensure zero defects. We support both small-batch (100–1,000 units) prototyping and high-volume (100k+ units) production with multi-cavity molds for cost efficiency.

The advantages of our plastic fitting injection molding service include: Leak-proof guarantee—precision molding and strict quality control ensure ≤0.01ml/min leak rate for critical applications; Cost efficiency—injection molding enables high-volume production with low per-unit costs, and integrated design reduces assembly steps; Design flexibility—ability to mold complex fitting geometries (e.g., multi-port manifolds, integrated valves) in one step, which is difficult with metal fabrication; Corrosion resistance—plastic materials eliminate rust issues, extending fitting lifespan in harsh environments; Lightweight—plastic fittings are 30–60% lighter than metal alternatives, reducing system weight and installation labor.

Value-Added Assembly for Molded Plastic Fittings

To complement our plastic fitting injection molding service, we offer custom assembly solutions—integrating molded fittings into ready-to-install sub-assemblies. Examples include: assembling fitting manifolds with valves and filters for industrial fluid systems, integrating medical fittings with tubing and connectors for diagnostic equipment, and kitting plumbing fitting sets (elbows, tees, couplings) for residential/commercial projects. Our assembly team uses specialized fixtures to ensure precise fitting alignment and secure connections, and conducts final system pressure testing to validate assembly quality. This turnkey service streamlines your supply chain, saving you time and labor costs associated with sourcing and assembling individual components.

As your trusted plastic fitting injection molding partner, we prioritize understanding your unique fluid/gas system requirements—from pressure and temperature to chemical compatibility. Whether you need custom medical fittings for sterile applications or industrial fittings for harsh chemical environments, our expertise ensures every plastic fitting is engineered for optimal performance and reliability. Contact us today to discuss your plastic fitting project and experience the difference of working with a specialized molding partner.

We are plastic mold maker and can provide custom mold service, we can make injection molds, blow molds, rotational molds and die-casting molds.

For custom injection molds, we can provide professional custom injection molding services. Usually Plastic injection mold manufacturing Molding are manufactured using injection molding technology. The mold materials for injection molds can be chosen from P20, 718, S136, H13 and so on. The mold material reflects the mold life and product material requirements.

For parts that require blow molding production, we can also provide professional custom blow molding services.

Plastic injection mold manufacturing Injection Mould making

1.We communicate product design according to samples/drawings and your requirements.

2.After the product design is confirmed, we carry out the mold design, we provide all kinds of injection molds, blow molds, silicone molds, die-casting molds services.

3.Material procurement, steel cutting and mold basic tools.

4.Mold assembly

5.Mold inspection, tracking and controlling mold processing.

6. We will inform you the date of mold trial and send you the sample inspection report and injection parameters together with the sample.

7.Your instruction and confirmation of shipment.

8.Prepare the mold before packing.

Plastic injection mold manufacturing molding Specification

1. Professional manufacturer, design, production injection mould and stamping mould quality control

2. rich export experience plastic injection mould and stamping mould

3. Reasonable price of design mould

4. Cavities: single or as per your requirements cavity

5. Treatment: S45C Pretreat>25Hrc,And Nitriding

6. Mould Steel: Cavity ,Core and slide: P20 ,2738,2136 available Moldbase :LKM available

7. Standard:DEM ,HUSKY,available

8. Hot runner: according to your demand

9. Life time: >300 Thousand Times

10. Package: Plywood case, anti-rust paint

Mold design：

Information you need to provide us

1. If you have drawings, 2D drawings, 3D drawings (preferably in STEP format).

2. If there are no drawings, you need to provide specific length, width, height and weight information. (It’s best to send us samples)

3. Should the mold be sent to your country, or leave the mold in our factory and we will help you produce the product.

4. Mold material requirements, cavity number requirements (you can tell us about the size of your injection molding machine)

5. Product material requirements and product quantity. (You can tell us about the use of the product and we can give you suggestions)

Transaction process:

Mold testing：

Once the mold is complete, I do a mold test. It usually takes about 3-5 days to complete. We need to assemble the mold, adjust the pressure data of the machine, and try production. We need to check whether there are problems during the normal production of the mold and make modifications.

Product packaging

Packaging according to your needs

1.By air ,it takes 3-7 days for delivery .The goods can be shipped by DHL ,Fedex ,UPS .

2.By sea ,the delivery time is based on your port .

To South East Asian Countries takes about 5-12 days

To Middle east countries takes about 18-25 days

To European countries takes about 20-28 days

To American countries takes about 28-35 days

To Australia takes about 10-15 days

To African countries takes about 30-35 days.

Factory

Video-1: (Factory Video)

Video-2: (Injection Molding)

Video-3: (Blow molding)

Video-4: (Blow molding)

Video-5: (Roll molding)

Customer satisfaction is our most important goal. We focus on communication and cooperation with our customers, always pay attention to their needs and provide quick response and quality customer service. Our injection production mold factory is committed to establishing long-term relationships and ensuring that our customers receive the best after-sales service during the purchase and use of our products, and we will definitely do our best to solve any problems for our customers.

FAQ

1. Who are we?

We are based in Zhejiang, China, start from 2014,sell to North America(30.00%),Southern Europe(10.00%),Northern.

Europe(10.00%),Central America(10.00%),Western Europe(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%). There are total about 51-100 people in our office.

2. How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment.

3. What can you buy from us?

Mould,Plastic Product, Metal Product,Dental Product,CNC machining.

4. Why should you buy from us not from other suppliers?

Ningbo P&M Plastic Metal Product Co., Ltd. We main do all kinds of 3d design, 3d printing and plastic metal molds tooling and products. We have our own engineer and factory. One-stop supply:3d design - 3d printing - mold making - plastic injection.

5. What services can we provide?

Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU;

Accepted Payment Currency:USD,EUR;

Accepted Payment Type: T/T,L/C,PayPal,Western Union,Escrow;

Language Spoken:English,Chinese,Spanish,French,Russian.

6. What are the characteristics of your service?

1. Your inquiry related to our products or prices will be replied within 24hours.

2. Welltrained and experienced staffs to answer all your enquiries in fluent English.

3. Offering the support to solve the problem in the application or selling period.

4. Competitive prices based on same quality.

5. Guarantee samples quality same as mass production quality.